Electric power conversion systems inventions 05/06

20060109691 - Power converter: A power converter comprises an inductor (L) and a main switch (M1) having a main current path, the inductor (L) and the main current path are arranged in series to receive a DC-input voltage (VIN). A control circuit (CC) controls on-periods (Ton) and/or off-periods (Toff) of the main switch (M1)...

20060109692 - Switching power source device: The ON duration of an N channel MOS transistor is set based on a target voltage at a node between a resistor and a light receiving element of a photocoupler. A comparator compares the target voltage with a reference voltage at a node between a variable resistor and a resistor....

20060109693 - Switching power supply device and switching method: A current flowing through a reactor flows through a resistor, which generates a voltage in accordance with the value of the current. As the voltage generated by the resistor is greater than or equal to the threshold of a transistor, the transistor is in an on state. As the current...

20060109694 - Auxiliary quasi-resonant dc tank electrical power converter: An auxiliary quasi-resonant DC tank (AQRDCT) power converter with fast current charging, voltage balancing (or charging), and voltage clamping circuits is provided for achieving soft-switched power conversion. The present invention is an improvement of the invention taught in U.S. Pat. No. 6,111,770, herein incorporated by reference. The present invention provides...

20060109695 - Power converters having capacitor resonant with transformer leakage inductance: Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected...

20060109696 - Power converters having output capacitor resonant with autotransformer leakage inductance: Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected...

20060109697 - Synchronous rectification mode dc-to-dc converter power supply device: A DC-to-DC converter power supply device includes drive circuits for generating different drive waveforms from a drive pulse of an oscillation control circuit portion; a first switching element driven by a drive circuit; a second switching element driven by a drive circuit; and a third switching element connected in parallel...

20060109698 - Self-driven synchronous rectifier circuit: A DC-DC power converter has a transformer with a primary side and secondary side. A first power transistor is coupled between a first end of a first winding of the secondary side and a ground terminal. A second power transistor is coupled between a second end of the first winding...

20060109699 - Pulsating current inverter control circuit: A pulsating current inverter control circuit aims to convert AC power provided by an external electric source to a pulsating current through a rectification unit. The inverter has a control unit which outputs an operation frequency to an actuation unit to divide the pulsating current to a plurality of electric...

20060109700 - Pulsating current inverter control circuit: A pulsating current inverter control circuit aims to convert AC power provided by an external electric source to a pulsating current through a rectification unit. The inverter has a control unit outputting an operation frequency to an actuation unit to divide the pulsating current to a plurality of electric pulse...

20060109701 - Method and system for producing controlled frequency power from a variable frequency power source: A circuit producing power with controlled frequency from a variable frequency power source (14) includes an AC bus (20) connected to the variable frequency power source (14) and a plurality of load circuits, each load circuit including an AC input (24) and an AC output (26), an AC contactor (30)...

20060109702 - Load control circuit and method for achieving reduced acoustic noise: A load control circuit having first and second terminals for connection in series with a controlled load comprises a bidirectional semiconductor switch for switching at least a portion of both positive and negative half cycles of an alternating current source waveform to the load. The bidirectional semiconductor switch has a...

20060104095 - Method for implementing radiation hardened, power efficient, non isolated low output voltage dc/dc converters with non-radiation hardened components: A method of producing an economical DC/DC converter that efficiently produces a relatively low output voltage and operates in a high ionizing radiation dose environment such as found in spacecraft and particle accelerator applications. That is, the converter comprises two P-channel FETs, a switching means for switching conductivity between the...

20060104096 - System and method for monitoring power supply operation: A power supply for a portable electronic device includes power circuitry for converting AC power from an AC power supply to DC power for the portable device. A processor is coupled to the power circuitry for receiving a plurality of parameters. The processor determines the status of the power supply...

20060104097 - Dc converter: A primary winding 5a of a transformer T and a switch Q1 are connected in series with a DC power source Vdc1. A series circuit composed of a switch Q2 and a snubber capacitor C3 is connected in parallel with the primary winding or the switch Q1. A saturable reactor...

20060104098 - Voltage-regulating device for charge pump: A voltage-regulating device for charge pump is disclosed. The charge pump outputs an output voltage according to the operation of at least one clock signal. The voltage-regulating device includes at least one voltage regulating capacitor and at least inverter. The inverter is for receiving the clock signal and outputting an...

20060104099 - Power output device of a computer power supply: A power output device of the present invention comprises a power supply having an input end for conducting electric current and an output device for supplying power to a computer. The output device has the following elements. A main cable and a sub-cable are connected to a bus on a...

20060098460 - Switched mode power supply responsive to current derived from voltage across energy transfer element input: A switched mode power supply having a regulated reflected voltage. In one circuit, a power switch is coupled between first and second electrical terminals. An energy transfer element is coupled to the first electrical terminal of the power switch. A power supply rail is coupled to the second electrical terminal....

20060098461 - Dc-ac converter: A DC-AC converter is applicable for transforming direct current (DC) to alternating current (AC). The DC-AC converter includes a voltage boost module and a DC-AC converter module. Herein the voltage boost module includes a voltage bypass circuit and a voltage boost circuit, both of which receive input voltage from DC...

20060098463 - Method and apparatus to provide temporary peak power from a switching regulator: Various techniques directed to providing temporary peak power from a switching regulator are disclosed. In one aspect, a switching regulator includes a switch that is to be coupled between a power supply input and an energy transfer element of the power supply. A controller is coupled to be responsive to...

20060098462 - Power supply and its controlling method: When an AC power supply (9) is powered up, a constant current supply section (14) supplies a constant current to a capacitor (C3) to charge the capacitor (C3). When a voltage across the capacitor (C3) becomes equal to or greater than a predetermined voltage, a switch control section (17) sets...

20060098464 - Switching power supply: A switching power supply includes a first series circuit formed by connecting first and second switching elements in series at both ends of a direct-current power source, a second series circuit formed by connecting a resonant capacitor, a resonant reactor, and a primary winding of a transformer in series at...

20060098465 - Undershoot eliminator circuit and method for synchronous rectified dc-dc converters: An undershoot eliminator circuit that avoids the occurrence of a negative undershoot that typically occurs when the secondary side synchronous driver of an isolated DC-DC converter is turned off. An energy storage element in an auxiliary supply on the secondary side of the converter is discharged to avoid a negative...

20060098466 - Demagnetization circuit for using in push-pull circuit: A demagnetization circuit that is used in a push-pull circuit, when the positive-half-period circuit is on and the negative-half-period circuit is off, a pulse width modulation signal (Vga) at MOSFET side of the positive-half-period circuit is inversed (PWB) and then transmitted into negative-half-period demagnetization circuit, which renders the negative-half-period demagnetization...

20060098467 - Method and device for controlling voltage: A voltage control device for connection to an electrical supply having an alternating supply voltage, and relative method for controlling voltage. The device comprising: an input (P1, P2, P3) having an input voltage, said input for connection to the electrical supply; an output (L1, L2, L3) having an output voltage;...

20060092671 - Semiconductor device for controlling switching power supply and switching power supply unit using the same: A semiconductor device for controlling a switching power supply is provided, which can reduce power consumption at a light load of the switching power supply and improve the efficiency of the power supply. During the intermittent switching operation of a switching element, when a return signal is outputted from a...

20060092672 - High-voltage generator and method of controlling high voltage: Disclosed is a high-voltage generator and method of controlling high voltage. The high-voltage generator includes: a power-supplying unit for rectifying an AC power supplied from the outside and generating a first and a second DC powers; a controlling unit to generate PWM (Pulse Width Modulated) signal with a predetermined duty-ratio...

20060092673 - Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components: A method of transferring energy is disclosed. In one aspect, a method includes transferring energy from a first winding wound around a transformer core to a second winding wound around the transformer core. The first and second windings capacitively coupled to electrical earth. The method further includes generating a third...

20060092674 - Powered hand held devices: A powered hand held device having an improved power supply with both a low power source in parallel with a high power source from ultracapacitors. The ultracapacitor power is used by the device motor during certain peak power demands which require high power to the device motor. An improved hand...

20060092675 - Power supply noise reduction circuit and power supply noise reduction method: A power supply noise reduction circuit and a power supply noise reduction method for reducing power supply noise at any frequency, includes forcing a power supply noise to resonate to the resonance frequency of a parallel resonance circuit, including an inductor and a capacitor to set the frequency of the...

20060092676 - Push-pull inverter with snubber energy recovery: An exemplary power inverter comprises a push-pull inverter circuit that includes a transformer having a primary winding coupled to a DC bus and a secondary winding coupled to an AC bus, main power switches coupling each end of the primary winding to a DC return, and one or more supplemental...

20060092677 - Architecture for achieving resonant circuit synchronization of multiple zero voltage switched push-pull dc-ac converters: A multi-stage, push-pull driven, resonant DC-AC converter ties the center-taps of primary windings of respective push-pull stages together, and drives each center-tap with a current source. Tying the center-taps of the primary windings of the respective DC-AC converters' transformers together forces the voltages at these locations to be the same,...

20060092678 - Apparatus and method for power conversion: A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The charging and discharging circuit includes a first condenser connected with...